文献类型：期刊文章

作　　者：张丁非[1,2] 齐福刚[1,2] 兰伟[3] 石国梁[1,2] 赵霞兵[1,2]

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]重庆大学国家镁合金材料工程技术研究中心,重庆400044 [3]重庆科技学院冶金与材料工程学院,重庆401331

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(2007CB613700)supported by the National Basic Research Program of China;Project(2007BAG06B04)supported by the National Key Technology R&D Program;Project(CSTC,2009AB4008)supported by the Chongqing Sci&Tech Program;Project(50725413)supported by the National Natural Science Foundation of China;Project(CDJXS10132202)supported by the Fundamental Research Funds for the Central Universities, China

年　　份：2011

卷　　号：21

期　　号：4

起止页码：703-710

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2011_2012、EBSCO、EI、IC、INSPEC、JST、SCI(收录号：WOS:000290515800001)、SCI-EXPANDED(收录号：WOS:000290515800001)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：The effects of Ce addition on the microstructure of Mg-6Zn-1Mn alloy during casting, homogenization, hot extrusion, T4, T6 and T4＋two-step aging were investigated. The mechanical properties of alloys with and without Ce were compared. The results showed that Ce had an obvious effect on the microstructure of ZM61-0.5Ce alloy by restricting the occurrence of dynamic recrystallization and restraining the grain growth during extrusion and heat treatment subsequently. A new binary phase Mg 12 Ce was identified in ZM61-0.5Ce alloy, which distributed at grain boundaries and was broken to small particles distributed at grain boundaries along extrusion direction during extrusion. The mechanical properties of as-extruded ZM61-0.5Ce alloy were improved with the addition of Ce. The improved tensile properties of as-extruded ZM61-0.5Ce alloy were due to the finer grain sizes as compared to ZM61 alloy. However, the UTS and YS decreased severely and the elongation increased when ZM61-0.5Ce was treated by T6 and T4＋two-step aging. Brittle Mg 12 Ce phase, which was distributed at the grain boundary areas and cannot dissolve into the Mg matrix after solution treatment, became crack source under tensile stress.

关 键 词：Mg-6Zn-1Mn alloy  CERIUM MICROSTRUCTURE mechanical properties  

分 类 号：TG146.22[材料类]